Vacuum fuel-feeding system



F. D. NELSON VACUUM FUEL FEEDING SYSTEM.

APPLhZATlON FILED FEB. 18, 1921.

izented Nov. 15, 1921.

FREDERICK D. NELSON, OF DETROIT, MICHIGAN.

VACUUM FUEL-FEEDING SYSTEM.

Specification of Letters Patent.

Patented Nov. 15, 1921.

Application filed February 18, 1921. Serial No. 445,964.

" To all whom it may concern Be it known that I, FREDERICK l). a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan havc invented certain new and useful Improvements in Vacuum Fuel-Feeding Systems, of which the following is a specification.

My invention relates ing system for internal combustion engines particularly adapted for use in connection with automotive vehicles. The object is to provide in connection with a vacuum tank an auxiliary fuel reservoir supplied from N nnsoN.

to vacuum fuel feedthe vacuum chamber ofsuch tank, rovided with an independently controlled (Ischarge leading to the carburetor.

1n the known conventional construction because of the limited capacity of the vacuum tank, it is not possible to cover a very great distance after the main reservoir has been exhausted. My invention makes itpossible to travel a considerable distance after such occurrence. Likewise in the present type of construction, whcn the supply is ex baustcd in the vacuum tank, it is necessary to refill vacuum tank to secure engine operation.

My invention provides an auxiliary supply of fuel, not capable of exhaustion in the feed provided for normal 0 iration, but independently controlled, capa lie to supply the carburetor until the vacuum tank is again filled. tion in the feed pipe to or from the vacuum tank the supply in the auxiliary tank would be sullicient to keep the engine running until a repair station might-be reached.

These and other'objects of the invention together with details of construction will clearly appear from the within drawingtogcthcr with the within specification and appcndcd claims, in which:

Figure 1 is a vertical cross section through my improved form of vacuum tank.

Fig. 2 is a plan of the control positioned on the dash. i t

In the drawings, let a indicate the vacuum chamber, 6 the lower and gravity fccd chamber. Fuel inlet 0 from the main fuel reservoir. suction conduit 11 from the engine, atmospheric opening 6, float f, together with the lever and rods controlling the valves which regulate the passage of fluid through such conduits, and conventional construction, likewise the discharge pipe 9,

.ing old and thc Further should there be an obstrnc ,chargc conduit 7).

. chamber with its flapper valve Ii, which feeds the lowcr tank I). and through discharge pipe 2', leading to the carburctcr. and the drain it, from the gravity fuel feed tank 6 are well known. the above described construction be one commonly found in use today.

I provide an auxiliary fuel tank m. which surrounds the tank I), which is supplied with fuel from the vacuum tank a, by means of a discharge pipe a. the passage of fuel through which is controlled by a gravity flapper valve It, which controls flow of fuel through pipe g It will be seen there lower tank I), is

fore that when the first filled the secondar tank 71!. is likewise filled, and that this tank m remains filled and has no effect on the normal fuel feed to the carbureter, the system operating in. the usual manner. Scondary tank m. is provided with an air vent passagcway m leading to the air opening c, so that the auxiliary tank, like the lower tank I1. is always open to the atmosphere. The auxiliary tank as shown is formed by the provision of a jacketed wall for the lowcr tank I).

Auxiliary ta'uk'm is provided with a dis chargc pipe p emptying into discharge pipe 1' which leads to the carbureter. Passage of fuel through pipe 7) is controlled by means of a valvc q. regulated from the dash as shown in Fig. 2. The hand lever is indicatcd by lcttcr .s'. and in connection to actuate the valve as t.

In the operation of mydevice when, for any reason, it is desired to feed the carburetcr from the auxiliary tank valve 9 is actuated to permit flow of fuel through disllaving described my invention, I claim;v

1. In a vacuum fue feeding system for internal combustion engines in combination with the vacuum chamber, agravity feed discharging into the carbureter, said gravity feed chamber provided with a. jackctcd wall adapted to rec-eye fuel, a discharge conduit leading from said jacketed wall chamber to the discharge means leading .from the gravity feed chamber tothe carbureter'.

2. In a vacuum fuel feeding system for internal combustion engines, in combination with the vacuumtank, an auxiliary gravity feed fuel tank provided with means for being supplied with fuel from the vacuum tanlc. and provided with an independently controlled discharge means normally inoperative leading therefrom to the carbureter. 3. In a vacuum fuel feeding system for internal combustion engines, in combination with the vacuum chamber of the vacuum tank, a gravity feed fuel tank provided with means discharging into the carburetcr, an auxiliary gravity feed fuel tank, discharge means leading from the vacuum chamber to the auxiliary tank, discharge mcans leading from the auxiliary tank to thc carbureter. a valve positioned therein controlled from the dash adapted to regulate the flow of fuel therethrough.

4. in a vacuum fuel feeding system for internal combustion engines. in combination with the vacuum chamber of a. vacuum fuel tank, a gravity fuel feed chamber supplied therefrom provided with a discharge conduit leading: to the carburetcr. a secondary gravity t'ucl teed chamber surrounding said fuel chamber adapted to be supplied with fuel from the vacuum chamber. discharge means leading from said secondary chambcr to the carbureter, means for regulating the How of fuel through said discharge mcans which leads from the secondary chamber to the carburetcr.

In a vacuum fuel feeding-system for internal combustion engines, in combination with the vacuum chamber of a vacuum l'ucl tanlc a gravity i'ucl iccd chamber supplied therefrom provided with a discharge conduit lcading to the carburctcr, a secondary gravity fuel feed chambcr adapted to be suppliedwith fuel from the vacuum chambcr. discharge means leading from sccondary chamber to the carbm'ctcr, means for rcgn latiug the flow of fuel through said dis charge means which leads from the secondary chamber to the carlmretcr.

FREDERICK D. NELSON. \Vitnesses:

MARY KENNEDY, Juurs E. HAmns. 

